48,871 research outputs found

    Evaluation of the Conrad N. Hilton Foundation Chronic Homelessness Initiative: 2015

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    Under a September 2011 contract with the Conrad N. Hilton Foundation, Abt Associates has been conducting an evaluation of the Hilton Foundation's Chronic Homelessness Initiative, with the goal of answering the overarching question: Is the Chronic Homelessness Initiative an effective strategy to end and prevent chronic homelessness in Los Angeles County? The evaluation is designed to provide both progress on interim milestones related to improving the systems for serving people experiencing chronic homelessness and estimates of the effect of permanent supportive housing (PSH) on residents and on the problem of chronic homelessness. Since the beginning of the Chronic Homelessness Initiative, the Foundation has awarded more than $56.7 million in multiyear grants to 29 nonprofit groups working in LA and beyond. Grantmaking has concentrated on three broad areas: homelessness systems change, targeted program delivery, and knowledge dissemination. The Foundation has shown leadership across the three funding areas by its willingness to take reasonable risks to innovate, by spurring other community stakeholders to action, and by expanding the reach of the Initiative beyond direct investments. The Foundation articulated six strategic goals for the Initiative. The goals represent significant milestones toward the ultimate goal of ending and preventing chronic homelessness in Los Angeles. In this fourth annual evaluation report, we provide updates on progress towards each goal. These status updates are summarized below and elaborated in the body of this report. Many of the five-year goals have been exceeded, and systems change efforts have created momentum for continued success

    Modeling Industrial Lot Sizing Problems: A Review

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    In this paper we give an overview of recent developments in the field of modeling single-level dynamic lot sizing problems. The focus of this paper is on the modeling various industrial extensions and not on the solution approaches. The timeliness of such a review stems from the growing industry need to solve more realistic and comprehensive production planning problems. First, several different basic lot sizing problems are defined. Many extensions of these problems have been proposed and the research basically expands in two opposite directions. The first line of research focuses on modeling the operational aspects in more detail. The discussion is organized around five aspects: the set ups, the characteristics of the production process, the inventory, demand side and rolling horizon. The second direction is towards more tactical and strategic models in which the lot sizing problem is a core substructure, such as integrated production-distribution planning or supplier selection. Recent advances in both directions are discussed. Finally, we give some concluding remarks and point out interesting areas for future research

    Optimal Capacity Adjustments for Supply Chain Control

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    Decisions on capacity are often treated separately from those of production and inventory. In most situations, capacity issues are longer-term, so capacity-related decisions are considered strategic and thus not part of supply planning. This research focuses on optimal supply planning with emphasis on variable capacity to meet uncertain demand. It also defines three levels of capacity change: operating hours, labor availability and production hardware availability. The work presented here deals with the fundamental decisions to determine capacity, production, and inventory to meet customer demand while optimizing revenue and costs over a planning horizon (typically the life of the product). With the Lagrangian technique for constrained optimization, it can be shown that the optimal supply capacity has upper and lower bounds. The optimal feedback policy prescribes increasing the supply capacity when at the beginning of the planning interval it is below the lower bound. Similarly, the supply capacity should be decreased to the upper bound when it is above the upper bound. This paper will present arguments for characterizing forecast evolution and information sharing in the supply chain to obtain a predictor-corrector approach to supply chain control.Singapore-MIT Alliance (SMA

    Practices for strategic capacity management in Malaysian manufacturing firms

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    While the notion of manufacturing capabilities is a long-standing notion in research on operations management, its actual implementation and management has been hardly researched. Five case studies in Malaysia offered the opportunity to examine the practice of manufacturing managers with regard to strategic capability management. The data collection and analysis was structured by using the notion of Strategic Capacity Management. Whereas traditionally literature has demonstrated the beneficial impact of an appropriate manufacturing strategy on the business strategy and performance, the study highlights the difficulty of managers to set the strategy, let alone implementing it. This is partly caused by the immense pressure of customers in these dominantly Make-To-Order environments for SMEs. Current concepts for manufacturing capabilities have insufficiently accounted this phenomenon and an outline of a research agenda is presented

    Modeling Alternatives Sustainable-Energy-Policy for the Supply Chain of Wind Power in Brazil.

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    Renewable energy studies have received high attention in the last few years due the increasing deployment of alternatives such as wind, solar and biomass, as a result of the urgency in reducing fossil fuels consumption. This situation has involved an important challenge for long-term renewables policy and energy system planning. Brazil is the richest country in terms of renewable sources in Latin American. Brazil has energy generation portfolio not much different form the Colombia one, and the understanding of this very important country will contribute to inspire other countries in the region, particularly Colombia. Since 2004 the Brazilian energy policy promotes wind power development aimed at complementing hydropower generation. Despite the energy policies adopted in Brazil, the supply chain of wind power has experienced barriers that include: insufficient transmission lines and the delays in energy projects caused by lack synchronic among the energy policies. Thus, the unsynchronised energy policy has affected the performance of renewable energy supply chain, which has produced an impact on the electricity market. This thesis addresses these issues by evaluating alternative sustainable energy-policy, which must reflect new institutional guidelines to support wind power penetration and their dynamics performance in supply chain

    Stewardship of the evolving scholarly record: from the invisible hand to conscious coordination

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    The scholarly record is increasingly digital and networked, while at the same time expanding in both the volume and diversity of the material it contains. The long-term future of the scholarly record cannot be effectively secured with traditional stewardship models developed for print materials. This report describes the key features of future stewardship models adapted to the characteristics of a digital, networked scholarly record, and discusses some practical implications of implementing these models. Key highlights include: As the scholarly record continues to evolve, conscious coordination will become an important organizing principle for stewardship models. Past stewardship models were built on an "invisible hand" approach that relied on the uncoordinated, institution-scale efforts of individual academic libraries acting autonomously to maintain local collections. Future stewardship of the evolving scholarly record requires conscious coordination of context, commitments, specialization, and reciprocity. With conscious coordination, local stewardship efforts leverage scale by collecting more of less. Keys to conscious coordination include right-scaling consolidation, cooperation, and community mix. Reducing transaction costs and building trust facilitate conscious coordination. Incentives to participate in cooperative stewardship activities should be linked to broader institutional priorities. The long-term future of the scholarly record in its fullest expression cannot be effectively secured with stewardship strategies designed for print materials. The features of the evolving scholarly record suggest that traditional stewardship strategies, built on an “invisible hand” approach that relies on the uncoordinated, institution-scale efforts of individual academic libraries acting autonomously to maintain local collections, is no longer suitable for collecting, organizing, making available, and preserving the outputs of scholarly inquiry. As the scholarly record continues to evolve, conscious coordination will become an important organizing principle for stewardship models. Conscious coordination calls for stewardship strategies that incorporate a broader awareness of the system-wide stewardship context; declarations of explicit commitments around portions of the local collection; formal divisions of labor within cooperative arrangements; and robust networks for reciprocal access. Stewardship strategies based on conscious coordination involve an acceleration of an already perceptible transition away from relatively autonomous local collections to ones built on networks of cooperation across many organizations, within and outside the traditional cultural heritage community

    Hirschmanian themes of social learning and change

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    Many development strategies assume (or desperately hope) that a country already has the capacity to plan and implement institutional reform or that such institutional reform can be pushed through with the external pressures of aid and conditionalities. In a decentralized reform strategy, developmental change is induced not by government fiat but by releasing and channeling local energies in smaller projects that will in due course spread through links, learning, imitation, and benchmarking. A"Christmas tree"of conditionalities hung on an adjustment loan is generally ineffective in getting a country to develop"ownership"of reform or in generating sustainable change. Development agencies need to work toward client governments genuine commitment to policy reform rather than believe that they can"buy"such commitment with aid money. But how does a country get from here to there? Here is where the Hirschmanian notion of unbalanced growth can be"rediscovered."A country that has already developed a"good policy environment"is like a country that can implement the"balanced growth plans"of the earlier debate. Such a country would be well on its way to development. When the central government lacks such a capability, the Hirschmanian approach is to look for"hidden rationalities"in small areas or on the periphery and then help the small beginnings to spread--using, where possible, the natural pressures of linkages. Rather than try to put all the pieces of a jigsaw puzzle together at once to make it look like the picture on the box, one starts in the small areas where the pieces are starting to fit together and builds outward, using the links between the pieces. the author shows several authors arriving at a similar strategy from different starting points. Similar ideas underlie the Japanese system of just-in-time production based on inventory, local problemsolving, benchmarking, and continuous improvement: Charles Lindblom's theory of incrementalism and muddling through; Donald Schon and Everett Rogers's treatment of decentralized social learning; and Charles Sabel's theory of learning by monitoring.Educational Sciences,ICT Policy and Strategies,Public Health Promotion,Enterprise Development&Reform,Health Monitoring&Evaluation,ICT Policy and Strategies,Health Monitoring&Evaluation,Educational Sciences,Economic Theory&Research,Environmental Economics&Policies

    Dynamics performance of the wind-power supply chain with transmission capacity constraints

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    Previous studies have shown that poor performance of energy supply chains arises from incorrectly interpret feedback information and time delays between decisions and actions in energy policy. This paper assesses alternatives to improve performance of wind-power supply chain with transmission constraints that contribute to enhance response capacity of the wind industry to changes of energy policy. In order to test these alternatives, this paper used a simulation model with system dynamics (SD), taking as case study Brazil. The simulation model represents the main time lags and fluctuations that exist in the wind-power supply chain. Four simulation scenarios were proposed to evaluate changes in auction-based policy in wind industry of Brazil. The results are related to operational capacity, inventory levels and response capacity. This paper provides an analysis of different scenarios that contribute with synchronization of auctions policy, including transmission capacity constraints

    Designing a supply network for a startup company

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    Thesis (M. Eng. in Logistics)--Massachusetts Institute of Technology, Engineering Systems Division, 2010.Cataloged from student submitted PDF version of thesis.Includes bibliographical references (p. 86-88).Our thesis introduces a supply chain framework catered for startup companies. Startup companies face unique circumstances such as constraints on financial and human resources, and greater uncertainty in demand. From our work with XL Hybrids, a startup company that hybridizes aftermarket vehicles, as well as interviews and literature review, we have attempted to distill supply chain strategies that can be applied to startup companies. To plan XL Hybrids' supply chain, we developed models for the following aspects of their supply chain: production scheduling, capacity planning, inventory policy, and component distribution. By running different demand and pricing scenarios, we gained an understanding of the impact of these variables on the four aspects of XL Hybrid's supply chain. Based on the scenario analysis and supply chain framework that we developed, we recommend that XL Hybrids be conservative with capacity expansion while strategically sourcing key components after considering volume discounts and different distribution methods.by Marcus S. Causton and Jianmin Wu.M.Eng.in Logistic
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